12 TO 36 MHZ 6TSOT VCXO
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DATASHEET
ICS726A
Description
Used in conjunction with an external pullable quartz crystal,
this monolithic integrated circuit replaces more costly
hybrid (canned) VCXO devices. The ICS726A is designed
primarily for data and clock recovery applications such as
ADSL modems, set-top box receivers, and telecom
systems.
The frequency of the on-chip VCXO is adjusted by an
external control voltage to the VIN pin. Since VIN is a high
impedance input, it can be driven directly from an PWM RC
integrator circuit. Frequency output increases with VIN
voltage input. The usable range of VIN is 0 to 3.3 V.
Features
• Uses an inexpensive 12 to 36 MHz external crystal
• Output frequency range of 12 to 36 MHz
• On-chip VCXO with guaranteed pull range of ±115 ppm
minimum
• VCXO tuning voltage 0 to 3.3 V
• Packaged in 6-pin TSOT
• Pb (lead) free package
Block Diagram
VDD
VIN
12-36MHz
Pullable
Crystal
X1
X2
Voltage
Controlled
Crystal
Oscillator
12-36MHz
GND
IDT™ / ICS™ 12 TO 36 MHZ 6TSOT VCXO
1
ICS726A
REV D 051310
